// This file is part of Keepass2Android, Copyright 2025 Philipp Crocoll.
//
//   Keepass2Android is free software: you can redistribute it and/or modify
//   it under the terms of the GNU General Public License as published by
//   the Free Software Foundation, either version 3 of the License, or
//   (at your option) any later version.
//
//   Keepass2Android is distributed in the hope that it will be useful,
//   but WITHOUT ANY WARRANTY; without even the implied warranty of
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//   GNU General Public License for more details.
//
//   You should have received a copy of the GNU General Public License
//   along with Keepass2Android.  If not, see <http://www.gnu.org/licenses/>.

using System.Collections.Generic;
using KeeTrayTOTP.Libraries;

namespace PluginTOTP
{
  public class TotpData
  {
    public TotpData()
    {
      HashAlgorithm = HashSha1;
    }

    public const string EncoderSteam = "steam";
    public const string EncoderRfc6238 = "rfc6238";
    public const string HashSha1 = "HMAC-SHA-1";
    public const string HashSha256 = "HMAC-SHA-256";
    public const string HashSha512 = "HMAC-SHA-512";


    public bool IsTotpEntry { get; set; }

    public byte[] TotpSecret { get; set; }
    public string TotpSeed
    {
      set { TotpSecret = Base32.Decode(value.Trim()); }
      get { return Base32.Encode(TotpSecret); }
    }
    public string Duration { get; set; }
    public string Encoder { get; set; }
    public string Length { get; set; }
    public string TimeCorrectionUrl { get; set; }

    public string HashAlgorithm { get; set; }

    public bool IsDefaultRfc6238
    {
      get { return Length == "6" && Duration == "30" && (HashAlgorithm == null || HashAlgorithm == HashSha1); }
    }

    public List<string> InternalFields { get; set; } = new List<string>();

    public static TotpData MakeDefaultRfc6238()
    {
      return new TotpData()
      {
        Duration = "30",
        Length = "6",
        HashAlgorithm = HashSha1
      };
    }
  }
}